It is desirable to accurately predict the heat load on turbine hot section components within the design cycle of the engine. Thus, a set of predictions of the heat flux on the blade outer air seal of a transonic turbine is here validated with time-resolved measurements obtained in a single-stage high-pressure turbine rig. Surface pressure measurements were also obtained along the blade outer air seal, and these are also compared to three-dimensional, Reynolds-averaged Navier-Stokes predictions. A region of very high heat flux was predicted as the pressure side of the blade passed a fixed location on the blade outer air seal, but this was not measured in the experiment. The region of high heat flux was associated both with very high harmonics of the blade-passing event and a discrepancy between predicted and measured time-mean heat-flux levels. Further analysis of the predicted heat flux in light of the experimental technique employed in the test revealed that the elevated heat flux associated with passage of the pressure side might be physical. Improvements in the experimental technique are suggested for future efforts.

1.
Dunn
,
M. G.
, 2001, “
Convective Heat Transfer and Aerodynamics in Axial Flow Turbines
,” ASME Paper No. 2001-GT-0506.
2.
Ameri
,
A. A.
, and
Bunker
,
R. S.
, 2000, “
Heat Transfer and Flow on the First-Stage Blade Tip of a Power Generation Gas Turbine: Part 2-Simulation Results
,”
ASME J. Turbomach.
0889-504X,
122
, pp.
272
277
.
3.
Bunker
,
R. S.
,
Bailey
,
J. C.
, and
Ameri
,
A. A.
, 2000, “
Heat Transfer and Flow on the First-Stage Blade Tip of a Power Generation Gas Turbine: Part 1-Experimental Results
,”
ASME J. Turbomach.
0889-504X,
122
, pp.
263
271
.
4.
Moore
,
J.
,
Moore
,
J. G.
,
Henry
,
G. S.
, and
Chaudhry
,
U.
, 1989, “
Flow and Heat Transfer in Turbine Tip Gaps
,”
ASME J. Turbomach.
0889-504X,
111
, pp.
301
309
.
5.
Metzger
,
D. E.
,
Dunn
,
M. G.
, and
Hah
,
C.
, 1991, “
Turbine Tip and BOAS Heat Transfer
,”
ASME J. Turbomach.
0889-504X,
113
, pp.
502
507
.
6.
Dunn
,
M. G.
,
Rae
,
W. J.
, and
Holt
,
J. L.
, 1984, “
Measurement and Analyses of Heat Flux Data in a Turbine Stage: Part I-Description of Experimental Apparatus and Data Analysis
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
106
, pp.
229
233
.
7.
Dunn
,
M. G.
,
Rae
,
W. J.
, and
Holt
,
J. L.
, 1984, “
Measurement and Analyses of Heat Flux Data in a Turbine Stage: Part II-Discussion of Results and Comparison With Predictions
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
106
, pp.
234
240
.
8.
Ameri
,
A. A.
, and
Steinthorsson
,
E.
, 1996, “
Analysis of Gas Turbine Rotor Blade Tip and BOAS Heat Transfer
,” ASME Paper No. 96-GT-189.
9.
Christophel
,
J. R.
,
Couch
,
E.
,
Thole
,
K. A.
, and
Cunha
,
F. J.
, 2004, “
Measured Adiabatic Effectiveness and Heat Transfer for Blowing From the Tip of a Turbine Blade
,” ASME Paper No. GT2004-53250.
10.
Nasar
,
H.
,
Ekkad
,
S. V.
, and
Bunker
,
R. S.
, 2005, “
Effect of Tip and Pressure Side Coolant Injection on Heat Transfer Distributions for a Plane and Recessed Tip
,” ASME Paper No. GT2005-68595.
11.
Mhetras
,
S.
,
Yang
,
H.
,
Gao
,
Z.
, and
Han
,
J. C.
, 2005, “
Film Cooling Effectiveness on Squealer Rim Walls and Squealer Cavity Floor of a Gas Turbine Blade Tip Using Pressure Sensitive Paint
,” ASME Paper No. GT2005-68387.
12.
Chana
,
K. S.
, and
Jones
,
T. V.
, 2002, “
An Investigation On Turbine Tip and BOAS Heat Transfer
,” ASME Paper No. GT2002-30554.
13.
Polanka
,
M. D.
,
Hoying
,
D. A.
,
Meininger
,
M.
, and
MacArthur
,
C. D.
, 2003, “
Turbine Tip and BOAS Heat Transfer and Loading Part A: Parameter Effects Including Reynolds Number, Pressure Ratio and Gas to Metal Temperature Ratio
,”
ASME J. Turbomach.
0889-504X,
125
, pp.
97
106
.
14.
Polanka
,
M. D.
,
Clark
,
J. P.
,
White
,
A. L.
,
Meininger
,
M.
, and
Praisner
,
T. J.
, 2003, “
Turbine Tip and BOAS Heat Transfer and Loading, Part B: Comparisons Between Prediction and Experiment, Including Unsteady Effects
,” ASME Paper No. GT2003-38916.
15.
Kline
,
S. J.
, and
McClintock
,
F. A.
, 1953, “
Describing Uncertainties in Single Sample Experiments
,”
Mech. Eng. (Am. Soc. Mech. Eng.)
0025-6501,
75
, pp.
3
8
.
16.
Moffat
,
R. J.
, 1982, “
Contributions to the Theory of Single-Sample Uncertainty Analysis
,”
ASME J. Fluids Eng.
0098-2202,
107
, pp.
153
160
.
17.
Ni
,
R. H.
, 1999, “
Advanced Modeling Techniques for New Commercial Engines
,”
XIV ISOABE Conference
, Florence, Sept. 5–10.
18.
Ni
,
R. H.
, 1982, “
A Multiple-Grid Scheme for Solving the Euler Equations
,”
AIAA J.
0001-1452,
20
(
11
), pp.
1565
1571
.
19.
Ni
,
R. H.
, and
Bogoian
,
J. C.
, 1989, “
Prediction of 3-D Multistage Turbine Flow Field Using a Multiple-Grid Euler Solver
,” AIAA Paper No. 89-0203.
20.
Davis
,
R. L.
,
Shang
,
T.
,
Buteau
,
J.
, and
Ni
,
R. H.
, 1996, “
Prediction of 3-D Unsteady Flow in Multi-Stage Turbomachinery Using an Implicit Dual Time-Step Approach
,” AIAA Paper No. 96-2565.
21.
Lax
,
P. D.
, and
Wendroff
,
B.
, 1964, “
Difference Schemes for Hyperbolic Equations With High Order Accuracy
,”
Commun. Pure Appl. Math.
0010-3640,
17
, pp.
381
398
.
22.
Wilcox
,
D. C.
, 1998,
Turbulence Modeling for CFD
,
2nd ed.
,
DCW Industries, Inc.
,
La Canada, CA
.
23.
Praisner
,
T. J.
, 2001, personal communication.
24.
Dunham
,
J.
, and
Meauze
,
G.
, 1998, “
An AGARD Working Group Study of 3D Navier-Stokes Codes Applied to Single Turbomachinery Blade Rows
,” ASME Paper No. 98-GT-50.
25.
Prasad
,
A.
, and
Wagner
,
J. H.
, 2000, “
Unsteady Effects in Turbine Tip Clearance Flows
,”
ASME J. Turbomach.
0889-504X,
122
(
4
), pp.
621
627
.
26.
Schultz
,
D. L.
, and
Jones
,
T. V.
, 1973, “
Heat Transfer Measurements in Short-Duration Hypersonic Facilities
,” NATO AGARDOGRAPH 165.
27.
Weaver
,
M. W.
,
Moselle
,
J. R.
,
Dunn
,
M. G.
, and
Guenette
,
G. R.
, 1994, “
Reduction of Data From Heat-Glux Gauges: A Documentation of the MIT ACQ Code and an Adaption to Single-Sided Gauges
,” Calspan Report No. 7733-4.
28.
Clark
,
J. P.
, and
Grover
,
E. A.
, 2006, “
Assessing Convergence in Predictions of Periodic-Unsteady Flowfields
,” ASME Paper No. GT2006-90735.
29.
Oldfield
,
M. L. G.
, 1988, “
Experimental Techniques in Unsteady Flows
,”
Oxford University Engineering
, Laboratory Report No. 1843/90.
30.
Cook
,
W. J.
, and
Felderman
,
E. J.
, 1966, “
Reduction of Data from Thin-Film Heat-Transfer Gauges: A Concise Numerical Technique
,”
AIAA J.
0001-1452,
4
(
3
), pp.
561
562
.
31.
Dunn
,
M. G.
, 2005, personal communication.
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